Question # 1

The kinetic energy of a body of mass 2 kg is 25J, its speed is

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5 ms-1

12.5 ms-1

25 ms-1

50 ms-1

If a force F makes an angle θ with the direction of motion of the force, then the formula for the work done will be:

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W = FS

W = FS cosθ

W = FS sinθ

W = FS tanθ

The work done in lifting a brick of mass 2 kg through a height of 5 m above ground will be:

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2.5 J

10 J

50 J

100 J

Formula of Power:

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P = wt

P = w/t

P = t/w

P = w/t²

Mass-Energy equation was given by:

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Newton

Einstein

Joule

Pascal

If the velocity of a body becomes double, then its kinetic energy will:

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Remain the same

Become double

Become four time

Become half

The rate of doing work is called :

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Power

Work

Efficiency

None of above

In a dam the water energy is called:

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Heat energy

Electrical energy

G.P.E

Mechanical enrgy

Formula of Gravitational potential energy is:

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mgh

mg/h

1/2 mv²

None of these

Which of the following is non-renewable fossil fuel?

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Oil

Coal

Gas

All of these

The ratio of output to input is called:

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work

Efficiency

Force

All of above

An ideal system gives output:

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50%

60%

80%

100%

_____________ can neither be created nor be destroyed.

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Light

Force

Energy

Weight

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9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers

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